Need help with Template (due to Gravity Form / Sparkpost combo)

I’m having trouble understanding the template settings to have “From email” and “reply-to” to work with Gravity Forms as I understand that it doesn’t work otherwise.
(as per this link https://github.com/SparkPost/wordpress-sparkpost/issues/24 and https://www.sparkpost.com/docs/integrations/using-templates-sparkpost-wordpress/ )

I’m using wordpress / sparkpost for multiple email sending parts.
I’m not sure if setting a template will limit me in the other parts of my website using sparkpost as sending service.

Anyone can provide me some more details how to setup a template that works for all email services?