3D FlipBook - Tracking single flipbook page views using GTM standard tag

Hi We where using this method, which you suggested some time ago, to track as pageviews the individual pages of the flipbook

function ready(scene) { scene.ctrl.addEventListener('endFlip', function(e) { flm_gtag(scene); }); scene.book.enableMouse(false); } ready;

function flm_gtag (scene) { gtag( 'event', 'page_view', { 'page_path': location.pathname + "/" + scene.ctrl.getPageForGUI(), }

We get on Google Analytics this result, which is what we need

/3d-flip-book//2 /3d-flip-book//4

Now we have switched to Google Tag Manager, installing the standard GTM tag on all pages, and we no longer receive data from individual pages in the flipbook, because gtag is not defined.

We tried to use solutions like

function flm_gtag (scene) { parent.dataLayer.push({ 'pageview': ...

but it doesn't work, I think because GTM tracks only the first page view, any other page view pushes are ignored, and in fact we see on Google Analytics

/3d-flip-book//

Could you suggest an alternative method to keep track of individual pages in the flipbook as pageviews using GTM tag?

Or should we define individual pages in the flipbook not as pageview but as user-defined events?

Or, again, or it would be better not to use GTM tag on 3d-flip-book pages but the gtag javascript, as we did before?

Thanks in advance, Luca