Google Tag Manager: Create Trigger to Exclude Automated "gtm." Events (gtm.load, gtm.dom, etc)

When setting up a pass-through to "track all events" in GTM, you may end up with unwanted events that come out of the box from the gtm.js / Google Tag Manager. To trigger on all events except those, you can use a "negative lookahead" regular expression as shown below.

^(?!gtm).*

Technically speaking, this matches from the start of the event name. Instead of a typical match, however, the match is of a negative lookahead (?!gtm) meaning the string "gtm" can not come next after the start of the event name (^).

What can come after the start? Anything else. (.*)

Sending only "gtm." events to a monitoring profile in GA4

Fortunately, most Google Tag Manager users have no problem creating a trigger to only fire on custom events that start with gtm.