Make sure you setup your custom dimensions inside Google Analytics read more here
First inside GTM setup the following variables as a data layer variable
Create variables in GTM with values:
ExactVisitor Exact Person => evPersonValue
ExactVisitor IP Traffic Type => evPersonValue
ExactVisitor Company Name => evCompanyValue
ExactVisitor Company Domain => evDomainValue
ExactVisitor Industry => evIndustry
ExactVisitor Employee Range => evEmployeeValue
ExactVisitor Tech Budget => evBudgetValue
ExactVisitor Global Alexa Rank => evAlexaRankValue
ExactVisitor HQ City => evCityValue
ExactVisitor HQ State => evStateValue
ExactVisitor HQ Country => evCountryValue
ExactVisitor Tech Stack => evTechValue
After Setup a tag called "Google Analytics Universal Analytics"
Next you need to define when it loads on your website define it as a Custom Load with Event Name: evmeta_loaded
Finally append the added Javascript to your site
<script>
provideGtmPlugin({
gtmEventKey: 'evmeta_loaded',
apiKey: 'YOUR TRACKING CODE',
});
</script>
Wait up to 24 Hours and the data will populate in Google Analytics as it takes time for GA when you add Custom Dimensions.
Verify with google analytics plugin if it works:
Using below plugin and right click inspect and Console: