How to pass custom information from Salesforce Communities to Google Analytics

@Kevin Dyer

If I understood correctly, you need to pass user data to GA4. And data payload should be populated dynamically containing current user info. I believe you can do that with component JS. 

import { LightningElement } from 'lwc';
import { getRecord } from 'lightning/uiRecordApi';
import Id from '@salesforce/user/Id';
import isGuest from '@salesforce/user/isGuest';
import UserNameFIELD from '@salesforce/schema/User.Name';
import userEmailFIELD from '@salesforce/schema/User.Email';
import userIsActiveFIELD from '@salesforce/schema/User.IsActive';
import userAliasFIELD from '@salesforce/schema/User.Alias';
export default class AnalyticsSupport extends LightningElement {
    error;
    @track payload = {}
    @track error;
    @wire(getRecord, { recordId: Id, fields: [UserNameFIELD, userEmailFIELD, userIsActiveFIELD, userAliasFIELD ]}) 
    currentUserInfo({error, data}) {
        if (data) {
        this.payload = { 
            detail: 
                {
                    'user_id': Id, 
                    'user_properties': {
                    'user_id': Id,
                    'user_type': (isGuest) ? 'Unauthenticated' : 'Authenticated',
                    'user_name': data.fields.Name.value,
                    'user_email': data.fields.Email.value,
                    'user_isActive': data.fields.IsActive.value,
                    'user_alias': data.fields.Alias.value
                }
            }
        } else if (error) {
            this.error = error ;
        }
    }
    }
connectedCallback()
{
    //publish custom event for the listener in the head markup to handle
    document.dispatchEvent(new CustomEvent('analyticsSupport', payload));
}
}