I cannot find any documentation indicating if the AS GR4 will work with your 898 ...
I guess you could connect it and see if it shows up in the Connected Accessories view or the GPS Diagnostic view ...
With the AS GR4 being such an older item - if would most likely not be as effective as the newer GPS antenna Accessories ...
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You could also contact HB with your question for more info ...
1-800-633-1468
Rickie