Hi @Maeldan! Welcome to the Community-- happy to have you here 
I understand you are collecting leads via non-HubSpot forms and landing pages. Are you using the non-HubSpot forms tool to sync these leads to HubSpot?
However they are syncing to HubSpot, and you have the goal of syncing that conversion information to Google Ads.
This Knowledge Base section walks you through creating HubSpot form submission ad conversion events, but in your case, we would be syncing non-HubSpot forms. I found this community thread that walks through a custom setup for offline conversions using a hidden GCLID.
Please let me know if I did not understand your questions!
I’d also like to invite @trevordjones, @NicoleSengers, and @Lucila-Andimol, to share any of their best practices when syncing offline conversion events from HubSpot to Google Ads. Thanks y’all!
Best,
Kennedy