gatsby-plugin-google-tagmanager script ordering

[nbaosullivan]

Hi there, I'm currently just implementing OneTrust's CookiePro that includes a cookie blocking script that really needs to go before everything else in the HEAD, especially tag manager (so that it can block cookies it will create). My problem is the ordering of the necessary script tags.
I have tried:

• via setHeadComponents in onRenderBody but that didn't help, GTM script tag would always come before it
• adding a custom src/html.js and placing before props.headComponents but the GTM script tag would come before still!

Is it the tag manager snippet doing this?

[nbaosullivan]

Ignore: upon initialising it seems GTM moves itself up. With JS disabled, using the src/html.js approach works (adding the script before {props.headComponents})