Do I need to file G325a with I130

If you are filing for a spouse, yes, if not, no.

If this is a spousal petition yes. If any other - no. That's the regs.

If you insist on doing it on your own, you need to start by at a very minimum, reading the form instructions. Your question indicates that you have not done so. You should retain an experienced immigration lawyer, whether myself or one of my colleagues, to review all the facts, advise you, and handle the case.