I see someone already asked about the past tense of "stop" and found that it shouldn't be "shtop" as verbix had it listed, but should just be "stop" (see the following link which someone had provided to the previous question http://www.csis.ul.ie/focloir/). Does that mean that it shouldn't be lenited after the particle "gur" either?

New to the Irish language here. Thanks for the help in advance.

Yes, that's right. The following "s" combinations can't be lenited:

Sc
Sm
Sp
St

An easy mnemonic is "Scallions Smell Spicy in Stew

Redwolf

But "sm" can be lenited in Munster

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Is fearr Gaeilg na Gaeltaċta ná Gaeilg ar biṫ eile
Agus is í Gaeilg Ġaoṫ Doḃair is binne

I don't think I've met that yet (or if I have, I've forgotten)! Would you mind providing some examples, please?

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Táim ag foghlaim Gaelainn na Mumhan

Tá fáilte roim nach aon cheartú!
I am a learner. Any translations offered are practice and should not be used unless confirmed.

I've learnt it from Gaeilge Chorca Dhuibhne.

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Is fearr Gaeilg na Gaeltaċta ná Gaeilg ar biṫ eile
Agus is í Gaeilg Ġaoṫ Doḃair is binne

An bhfuil taifead ar bith le chloisteáil le séimhiú ar ''sm''?

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Is fearr Gaeilg na Gaeltaċta ná Gaeilg ar biṫ eile
Agus is í Gaeilg Ġaoṫ Doḃair is binne

I Mumhain, tá do rogha agat i dtaobh séimhiú a chur ar sm, ach tá difríocht ann idir Chorcaí agus Corca Dhuibhne mar gheall ar an dá leitir san. Is minice i gCorca Dhuibhne shm, ach i gCorcaigh, is é sm, gan séimhiú, an nós is coitianta.

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The dialect I use is Cork Irish.
Ar sgáth a chéile a mhairid na daoine, lag agus láidir, uasal is íseal

Okay. Thanks, everyone. This helps a lot. Much appreciation. Also, thanks for the heads up on the Munster dialect twist with "sm".

No, it cannot.