Garudimimus was named after garuda, which appeared in India myth.

Like all other typical ornithomimids, G. brevipes is toothless. But only in this species, the degenerated first digit is still remained (the pes of typical ornithomimids is tridactyl; the first and fifth digits being lost). This is why it is considered to be more primitive than other ornithomimids. However, it is not known if the first digit remained in Harpymimus or Elaphrosaurus, which lived in Early Cretaceous and Late Jurassic, respectively, and were more primitive than G. brevipes.

Although ornithomimids are thought to have been fast runners, G. brevipes might have ran or walked rather slower than other relatives because of its distinct features with its hip and leg structures as a relatively short ileum (hip bone), tetradactyl pes, relatively short tibiotarsus (shinbone) and metatarsus (ankle bone), etc..

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