As @peternlewis said, it is not quite possible on my French keyboard where ^ is not on the sixth key and ^ has a special effect key to combine with next pressed key.
Speaking of which, current keyboard shortcuts based on number keys do not work on French keyboard, where numbers are not the main glyph of those upper key row.
As was already said on another topic, Ctrl+Shift+g seems ok:
One minor bug: on Android Chrome, my selection seems to jump around. For example, frequently when I edit a post and click in the middle of the text, my caret is placed in a different spot from where I clicked.