Unfortunately,
Olive MX-GD is a made-up name. It does not refer to a single pure unmixed Procion MX dye color, but instead to a mixture of other dyes. This mixture is proprietary, that is, its contents are a trade secret, and it is not quite the same as the mixtures of dyes sold by any other dye supplier.
Kraftkolour had a wonderful website with a huge amount of useful information on it. It's a terrible loss. You can't even check what their color swatch for
olive MX-GD looked like. However, you can see it as one of the colors available in the
Dye Mixer Applet. It looks exactly like a green olive to me (not all color names are as meaningful as this one). We're not sure that the olive green in the Dye Mixer Applet is KraftKolour's blend, but it's a start. Dharma's PR32 Olive Drab is much closer in color than their PR38 Khaki, which makes perfect sense given that, in English, khaki is considered to be a shade of brown, not green. (The name khaki comes from the Hindustani word for "dust colored", but, oddly, French uses the word khaki to refer to olive drab.) You might also look at the olive green Procion MX dye carried by Batik Oetoro.
Since you will not be able to buy a perfect match for your
olive green dye mixture anyway, you should consider mixing your own to match. The Jacquard Products Color Mixing Chart (here's a link to my copy of the
chart with generic dye names added) suggests mixing equal parts of
rust orange (Brown MX-GRN) and
medium blue (blue MX-R) to produce an
olive green. Not all dye suppliers carry the pure dull terracotta-colored Brown MX-GRN dye; Dharma does not, but ProChem, Jacquard, and G&S Dye do. (Bright orange MX-2R will give quite different results unless you tone it down with another color.) See my chart of
"Which Procion MX colors are pure, and which mixtures?" to identify catalog names used by different suppliers for the same dyes.
Paula