Unfortunately, the provided search results do not contain specific information about the company GBD at http://www.gbd.co.il or its LinkedIn page. However, based on the general understanding of "Global Business Development," such companies typically focus on expanding businesses globally through strategic partnerships, market research, and development of international business strategies. Their services might include market analysis, business consulting, and international expansion planning. The target audience could be businesses looking to expand globally. The unique selling proposition might be their expertise in navigating international markets and facilitating successful global partnerships.