ZylGPSReceiver is a Delphi & C++Builder component collection that communicates with a GPS receiver (Global Positioning System). It returns latitude, longitude, altitude, speed, course, heading and many other useful parameters of the current position and the parameters of the satellites in view. The component is extended to calculate distances and make conversions between different measurement units.

GylGSM is a Delphi & C++Builder component that communicates with a GSM modem or phone with integrated modem (almost all new generation mobile phones).

Main features:
- send SMS in text mode
- send SMS in PDU mode
- delete SMS
- dial in voice mode
- dial in data mode

GylGSM is a Delphi & C++Builder component that communicates with a GSM modem or phone with integrated modem (almost all new generation mobile phones).

GylGSM is a Delphi & C++Builder component that communicates with a GSM modem or phone with integrated modem (almost all new generation mobile phones).

Main features:
- send SMS in text mode
- send SMS in PDU mode
- delete SMS
- dial in voice mode
- dial in data mode
- answer incoming call
- hang up current conversation
- recognize calls and identify caller number
- new SMS message alert
- read PDU and text SMS (the message text must be in GSM 7-bit charset, multipart (concatenated) SMS and Unicode SMS are not yet supported)

- detect GSM modem
- execute custom AT commands