Unfortunately, something makes it non-working when selecting from gnome keyboard config dialog. So, I had to add typo typo:2 to xkb_symbols from setxkbmap -print output and put call of setxkbmap in autostartup programs. Resulting command line is:
$ setxkbmap -symbols 'pc+us+ru(typewriter):2+inet(evdev)+group(shifts_toggle)+level3(ralt_switch)+typo+typo:2'
Yay! I have typographic symbols in both English and Russian layouts switched with AltGr.