Yes, .GPR files could be imported into GeneSpring.
Please find the details below:
Two color array:
A) Two color .GPR files from Agilent standard array could be imported by selecting the “Agilent two color” as the experiment type in the ‘New Experiment’ window for the standard workflow.
B) Two color .GPR files from custom array could be imported by following the steps below:

1. Create GPR technology: The technology could be created using one of the files from, Annotations menu Create Technology From .gpr file Follow the wizard.
2. After creating the technology, you would have to import all the files by creating an Experiment from the Project menu New Experiment Select Experiment Type as “ Generic Two Color”

Single color array:
To import single color .GPR files, please create a custom technology (Annotations  Create Technology custom from file) followed by experiment creation from the Project menu New Experiment Select Experiment Type as “ Generic Single Color”