Want to know which families have signed your waiver before opening day? Have the form add an account tag when it's submitted, then filter your Accounts list by that tag.
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Tag accounts when they sign the waiver
Go to Settings > Members > Account Tags and add a tag called Waiver Form Submitted (or similar).
Go to Content > Gravity Forms, open your waiver form, and under Settings choose Account Tags.
Create a new feed.
Name the feed, pick Waiver Form Submitted as the tag to add, and save.
💡 Already have signed waivers? The tag is only added to new submissions, so tag earlier signers by hand. It doesn't matter whether one or both adults sign; the account gets tagged either way.
See who has signed
Go to Membership > Accounts and click Filters.
Under Tags, choose Waiver Form Submitted.
Click Save as view and name it, so you can pick it from the drop-down next to Filters anytime.
Optional: click Columns and turn on Tags to show tags in the list.
Clear the tag for a new season
Waiver submissions reset every January 1, but the tag doesn't. To start fresh, go to Membership > Accounts, select the tagged accounts, and use Bulk Actions > Update Tags to remove it.