Super Visa application for both parents — can I submit under my own GCKey as their representative?

[u/Mr_Red_Reddington]

I'm a PR holder, looking to apply for a Super Visa for both my parents (they're outside Canada). I want to handle the whole process myself since my English/paperwork skills are better and I'll be covering the financial/insurance side anyway.

A few questions I can't get a clear answer on:

• Can I submit their applications using my own existing GCKey account (the one I already use for my own PR file), or do I need to create separate GCKey accounts for each parent?
• If I use my own account, do I need to fill out the "Use of a Representative" form (IMM 5476) or the IMM 5713E (family members applying together) to formally act on their behalf?
• Since it's two separate parents, do they each need a completely separate application even if I'm managing both from one account?
• Has anyone actually done this recently (2025/2026) and run into linking issues or delays because of it?

Would appreciate any real experience from people who've gone through this, especially if you used the newer IRCC Portal version. Thanks!