Yes, the Garmin GDL 39, GDL 39 3D, and GDL 39R ADS-B receivers are compatible with ForeFlight, provided they have firmware version 4.0.0 or later installed. Below is a summary of the features supported by each device when used with ForeFlight:
| GDL Model | ADS-B Traffic | ADS-B Weather | AHRS Attitude | GPS (WAAS) | Connection Type |
| GDL 39 | ✓ | ✓ | X | ✓ | Bluetooth |
| GDL 39 3D | ✓ | ✓ | ✓ | ✓ | Bluetooth |
| GDL 39R | ✓ | ✓ | X | X | Bluetooth |
NOTE: Some features (e.g., AHRS Attitude for GDL 39 and GPS for GDL 39R) may require additional hardware from Garmin. Contact Garmin for detailed information on expanded capabilities.
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