This is, indeed, late 80’s vintage gas dryer...
Maytag gas dryers of this vintage are super easy to tell apart from the electric ones due to the access panel that they have on the front to make servicing the gas valve easier. You can tell that it is late 80’s by it still retaining the little knob for the door handle, just like my 1978 DE408, as well their earlier Halo-of-heat models had used since 1966. Around 1990, they changed to a small plastic handle in the upper corner of the door, like what my 1992 LDE7600 has. These Stream-of-heat dryers are renowned for reliability, and can last you a very long time if taken care of. My ‘78 model was in regular use for 43 years by the time I got it, and it was still in working condition.
Hope this helps,
Thatwasherguy.