O Gnome Text Editor será o editor de textos padrão do Gnome 42 e posteriores, confira os diferencias em relação ao antigo Gedit.

Gnome Text Editor

Text Editor é um editor de texto simples que se concentra no gerenciamento de sessões.
Ele trabalha duro para acompanhar as alterações e o estado, mesmo que você saia do aplicativo.
Você pode voltar ao seu trabalho mesmo que nunca o tenha salvo em um arquivo.

Recursos

Um editor simples focado em uma experiência padrão sólida
Destaque de sintaxe para linguagens de programação comuns
Search & Replace incluindo suporte para expressões regulares baseadas em PCRE2
Verificação ortográfica em linha
Impressão de documentos
Integração de desktop, incluindo modo escuro e salvando o estado da sessão
Suporte para .editorconfig e modelines
Suporte integrado para atalhos de teclado do Vim

Fonte

As primeiras diferenças vemos no menu dos APP o Gnome Text Editor a esquerda vem com:

Seletor de tema

Controle de tamanho da font

Outro diferencial é o corretor ortográfico ativado por padrão e sublinhando as palavras erradas, o Gedit ignora os erros.

O corretor ortográfico utiliza o hunspell, confira na lista abaixo os idiomas disponíveis.

hunspell-af.noarch : Afrikaans hunspell dictionary hunspell-ak.noarch : Akan hunspell dictionaries hunspell-am.noarch : Amharic hunspell dictionaries hunspell-ar.noarch : Arabic hunspell dictionaries hunspell-as.noarch : Assamese hunspell dictionaries hunspell-ast.noarch : Asturian hunspell dictionaries hunspell-az.noarch : Azerbaijani hunspell dictionaries hunspell-be.noarch : Belarusian hunspell dictionaries hunspell-ber.noarch : Amazigh hunspell dictionaries hunspell-bg.noarch : Bulgarian hunspell dictionaries hunspell-bn.noarch : Bengali hunspell dictionaries hunspell-br.noarch : Breton hunspell dictionaries hunspell-ca.noarch : Catalan hunspell dictionaries hunspell-cop.noarch : Coptic hunspell dictionaries hunspell-cs.noarch : Czech hunspell dictionary hunspell-csb.noarch : Kashubian hunspell dictionaries hunspell-cv.noarch : Chuvash hunspell dictionaries hunspell-cy.noarch : Welsh hunspell dictionaries hunspell-da.noarch : Danish hunspell dictionaries hunspell-de.noarch : German hunspell dictionaries hunspell-devel.i686 : Files for developing with hunspell hunspell-devel.x86_64 : Files for developing with hunspell hunspell-dsb.noarch : Lower Sorbian hunspell dictionaries hunspell-el.noarch : Greek hunspell dictionaries hunspell-en.noarch : English hunspell dictionaries hunspell-en-GB.noarch : UK English hunspell dictionaries hunspell-en-US.noarch : US English hunspell dictionaries hunspell-eo.noarch : Esperanto hunspell dictionaries hunspell-es.noarch : Spanish hunspell dictionaries hunspell-es-AR.noarch : Argentine Spanish hunspell dictionary hunspell-es-BO.noarch : Bolivian Spanish hunspell dictionary hunspell-es-CL.noarch : Chilean Spanish hunspell dictionary hunspell-es-CO.noarch : Colombian Spanish hunspell dictionary hunspell-es-CR.noarch : Costa Rican Spanish hunspell dictionary hunspell-es-CU.noarch : Cuban Spanish hunspell dictionary hunspell-es-DO.noarch : Dominican Spanish hunspell dictionary hunspell-es-EC.noarch : Ecuadorian Spanish hunspell dictionary hunspell-es-ES.noarch : European Spanish hunspell dictionary hunspell-es-GT.noarch : Guatemalan Spanish hunspell dictionary hunspell-es-HN.noarch : Honduran Spanish hunspell dictionary hunspell-es-MX.noarch : Mexican Spanish hunspell dictionary hunspell-es-NI.noarch : Nicaraguan Spanish hunspell dictionary hunspell-es-PA.noarch : Panamanian Spanish hunspell dictionary hunspell-es-PE.noarch : Peruvian Spanish hunspell dictionary hunspell-es-PR.noarch : Puerto Rican Spanish hunspell dictionary hunspell-es-PY.noarch : Paraguayan Spanish hunspell dictionary hunspell-es-SV.noarch : Salvadoran Spanish hunspell dictionary hunspell-es-US.noarch : US Spanish hunspell dictionary hunspell-es-UY.noarch : Uruguayan Spanish hunspell dictionary hunspell-es-VE.noarch : Venezuelan Spanish hunspell dictionary hunspell-et.noarch : Estonian hunspell dictionaries hunspell-eu.noarch : Basque hunspell dictionaries hunspell-fa.noarch : Farsi hunspell dictionaries hunspell-filesystem.x86_64 : Hunspell filesystem layout hunspell-fj.noarch : Fijian hunspell dictionaries hunspell-fo.noarch : Faroese hunspell dictionaries hunspell-fr.noarch : French hunspell dictionaries hunspell-fur.noarch : Friulian hunspell dictionaries hunspell-fy.noarch : Frisian hunspell dictionaries hunspell-ga.noarch : Irish hunspell dictionaries hunspell-gd.noarch : Scots Gaelic hunspell dictionaries hunspell-gl.noarch : Galician hunspell dictionaries hunspell-grc.noarch : Ancient Greek hunspell dictionaries hunspell-gu.noarch : Gujarati hunspell dictionaries hunspell-gv.noarch : Manx hunspell dictionaries hunspell-haw.noarch : Hawaiian hunspell dictionaries hunspell-he.x86_64 : Hebrew hunspell dictionaries hunspell-hi.noarch : Hindi hunspell dictionaries hunspell-hil.noarch : Hiligaynon hunspell dictionaries hunspell-hr.noarch : Croatian hunspell dictionaries hunspell-hsb.noarch : Upper Sorbian hunspell dictionaries hunspell-ht.noarch : Haitian Creole hunspell dictionaries hunspell-hu.noarch : Hungarian hunspell dictionaries hunspell-hy.noarch : Armenian hunspell dictionaries hunspell-ia.noarch : Interlingua hunspell dictionaries hunspell-id.noarch : Indonesian hunspell dictionaries hunspell-is.noarch : Icelandic hunspell dictionaries hunspell-it.noarch : Italian hunspell dictionaries hunspell-kk.noarch : Kazakh hunspell dictionaries hunspell-km.noarch : Khmer hunspell dictionaries hunspell-kn.noarch : Kannada hunspell dictionaries hunspell-ko.noarch : Korean hunspell dictionaries hunspell-ku.noarch : Kurdish hunspell dictionaries hunspell-ky.noarch : Kirghiz hunspell dictionaries hunspell-la.noarch : Latin hunspell dictionaries hunspell-lb.noarch : Luxembourgish hunspell dictionaries hunspell-ln.noarch : Lingala hunspell dictionaries hunspell-lt.noarch : Lithuanian hunspell dictionaries hunspell-lv.noarch : Latvian hunspell dictionaries hunspell-mai.noarch : Maithili hunspell dictionaries hunspell-mg.noarch : Malagasy hunspell dictionaries hunspell-mi.noarch : Maori hunspell dictionaries hunspell-mk.noarch : Macedonian hunspell dictionaries hunspell-ml.noarch : Malayalam hunspell dictionaries hunspell-mn.noarch : Mongolian hunspell dictionaries hunspell-mos.noarch : Mossi hunspell dictionaries hunspell-mr.noarch : Marathi hunspell dictionaries hunspell-ms.noarch : Malay hunspell dictionaries hunspell-mt.noarch : Maltese hunspell dictionaries hunspell-nb.noarch : Bokmaal hunspell dictionaries hunspell-nds.noarch : Lowlands Saxon hunspell dictionaries hunspell-ne.noarch : Nepali hunspell dictionaries hunspell-nl.noarch : Dutch hunspell dictionaries hunspell-nn.noarch : Nynorsk hunspell dictionaries hunspell-nr.noarch : Southern Ndebele hunspell dictionaries hunspell-nso.noarch : Northern Sotho hunspell dictionaries hunspell-ny.noarch : Chichewa hunspell dictionaries hunspell-oc.noarch : Occitan hunspell dictionaries hunspell-om.noarch : Oromo hunspell dictionaries hunspell-or.noarch : Odia hunspell dictionaries hunspell-pa.noarch : Punjabi hunspell dictionaries hunspell-pl.noarch : Polish hunspell dictionaries hunspell-pt.noarch : Portuguese hunspell dictionaries hunspell-qu.noarch : Quechua Ecuador hunspell dictionaries hunspell-quh.noarch : Quechua, South Bolivia hunspell dictionaries hunspell-ro.noarch : Romanian hunspell dictionaries hunspell-ru.noarch : Russian hunspell dictionaries hunspell-rw.noarch : Kinyarwanda hunspell dictionaries hunspell-sc.noarch : Sardinian hunspell dictionaries hunspell-se.noarch : Northern Saami hunspell dictionaries hunspell-shs.noarch : Shuswap hunspell dictionaries hunspell-si.noarch : Sinhala hunspell dictionaries hunspell-sk.noarch : Slovak hunspell dictionaries hunspell-sl.noarch : Slovenian hunspell dictionaries hunspell-smj.noarch : Lule Saami hunspell dictionaries hunspell-so.noarch : Somali hunspell dictionaries hunspell-sq.noarch : Albanian hunspell dictionaries hunspell-sr.noarch : Serbian hunspell dictionaries hunspell-ss.noarch : Swati hunspell dictionaries hunspell-st.noarch : Southern Sotho hunspell dictionaries hunspell-sv.noarch : Swedish hunspell dictionaries hunspell-sw.noarch : Swahili hunspell dictionaries hunspell-ta.noarch : Tamil hunspell dictionaries hunspell-te.noarch : Telugu hunspell dictionaries hunspell-tet.noarch : Tetum hunspell dictionaries hunspell-th.noarch : Thai hunspell dictionaries hunspell-ti.noarch : Tigrigna hunspell dictionaries hunspell-tk.noarch : Turkmen hunspell dictionaries hunspell-tl.noarch : Tagalog hunspell dictionaries hunspell-tn.noarch : Tswana hunspell dictionaries hunspell-tpi.noarch : Tok Pisin hunspell dictionaries hunspell-ts.noarch : Tsonga hunspell dictionaries hunspell-uk.noarch : Ukrainian hunspell dictionaries hunspell-ur.noarch : Urdu hunspell dictionaries hunspell-uz.noarch : Uzbek hunspell dictionaries hunspell-ve.noarch : Venda hunspell dictionaries hunspell-vi.noarch : Vietnamese hunspell dictionaries hunspell-wa.noarch : Walloon hunspell dictionaries hunspell-xh.noarch : Xhosa hunspell dictionaries hunspell-yi.noarch : Yiddish hunspell dictionaries hunspell-zu.noarch : Zulu hunspell dictionaries

Para o corretor ortográfico português use o comando para a sua distribuição Linux.

Para Arch Linux e Manjaro