Currently when minecraft is giving error on different mod version upon entering the server it spits out mod ids.

I had wrong version of gt++ and forge was giving me error that "miscutils" mod is missing.
I found that it is actually GT++.

Maybe you can change modID to be more meaningfull? Like gtpp or something. Miscutils is veeeeeeeeeeeeeeeery vague.

https://github.com/draknyte1/GTplusplus/blob/master/src/Java/gtPlusPlus/core/lib/CORE.java#L53

No. Modid cannot be changed or I would've done so > a year ago.

All items in a world are registered with a name, that name is 'modid:itemname.name:metavalue', changing the modid would make all existing GT++ content in all players worlds vanish upon update.